Watch.



W. E. PORTER.

WATCH.

APPLICATION FILED Nov. 7, 1911.

COLUMBIA PLANOGRAPH Co" WASHINGTON. n c,

Patented Feb. 25,1913.

UNITED STATES PATENT OFFICE.

WILSON E. PORTER, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO NEW HAVEN CLOCK00., OF NEW HAVEN, CONNECTICUT, A CORPORATION.

WATCH.

Application filed November 7, 1911.

To all whom it may concern Be it known that I, lViLsoX E. PORTER, acitizen of the United States, residing at New Haven, in the county ofNew Haven and State of Connecticut, have invented a new and usefulImprovement in \Vatches; and I do hereby declare the following, whentaken in connection with the accompanying drawings and the letters ofreference marked thereon, to be a full, clear, and exact description ofthe same, and which said drawings constitute part of this specification,and represent, in

Figure 1 a view in front elevation of a stop-watch constructed inaccordance with my invention with the dial removed. Fig. 2 a brokensectional view on the line a-b of Fig. 1. Fig. 3 a detached view of thecenterpinion showing the split or rear end of its hollow shaft.

My invention relates to an improvement in watches, with the constructionof stopwatches or chronographs particularly in view, though not limitedto use in such watches; the objectbeing to provide dialwork of simpleand cheap construction.

With these ends in view, my invention consists in a watch having certaindetails of construction and combination of parts as will be hereinafterdescribed and pointed out in the claim.

In carrying out my invention as herein shown, I cut the dial-pinion 2directly upon the outer end of an arbor 3 which I shall hereafter callthe center-arbor on account of its correspondence to the center arborsof an ordinary watch, though in my watch it is not centrally located asthe name would imply. Upon the said arbor 3 I mount a wheel 4: which isimpinged against the in ner face of the said pinion 2. The said wheel awhich I shall call the driving minute-wheel, is rotated once an hour.The center-arbor 3 as thus constructed wit-h an integral pinion 2 andfurnished with the wheel 4, is shoved from front to rear through thehollow shaft 5 of the centerpinion 6, the said shaft 5 being journaledat its forward end in the front movementplate 7 and at its rear end inthe rear movement-plate 8, and having mounted upon it the center-wheel 9which is interposed be tween the said center-pinion 6 and the frontmovement-plate 7. For the purpose of securing a friction fit between thearbor 3 Specification of Letters Patent.

Patented Feb. 25,1913.

Serial No. 658,928. Y

will be sprung enough at its split rear end to grip the arbor so thatunder all normal conditions the arbor, with its pinion 2 and wheel 1,will revolve with the shaft which is driven in the usual manner from thetimetrain. In the stop-watch which I am now describing, the centerarbor3 and its immediately related parts are, as already indicated, notlocated in the center of the movement in accordance with ordinary usage,but are located to one side of the center of the movement to give ampleroom at the center of the movementfor the operation of the sweep-secondhand shaft to which a rocking motion is given in the usual manner.Therefore the driving minute-wheel 4 is meshed into a corresponding butdriven minute wheel 11 having the same number of teeth, revolving oncean hour, and provided with a hub 12 which receives the minute-hand whichis not shown. The said wheel 11 turns upon a stud 13 mounted in thefront movement-plate 7 and made hollow asusual for the reception of thesweep second-hand arbor which is not shown. The center pinion 2 meshesinto an hour-wheel 1% provided with a hub 15 to which the hour hand,also not shown, is applied, the hub'15 turning upon the hub 12aforesaid.

The center pinion 2, the center arbor 3, and the wheel 4: are driven bythe timetrain on account of the friction grip of the hollow center-shaft5 upon the arbor 3, but at the same time the friction thus securedyields to permit the arbor 3 to revolve within the shaft 5 in shiftingthe hands for setting the watch.

I call particular attention to the fact that my improved watch structureentirely dispenses wit-h a cannon pinion, that term being used in theartto designate a relatively long sleeve frict-ioned over a true centerarbor for being driven thereby and carrying the minute wheel which in myimproved structure is loosely mounted upon the hub 12 of the wheel 11.

I claim In a watch, the combination with the front and rearmovement-plates thereof, of

a split hollow center-shaft journaled in the said plates at one side ofthe center of the watch and formed with an integral centerpinion, acenter-arbor furnished at its front end with an integral center-pinion,and shoved from front to rear into the said split hollow center-shaftwith which it is frictionally coupled, a driving minutewheel mountedupon the said center-arbor a center-Wheel mounted upon the split hollowcenter-shaft, a stud located at the center of the watch, a drivenminute-wheel turning upon the said stud and meshed into by the drivingminute-wheel aforesaid, and an hour-wheel turning upon the hub of thedriven minute-wheel and nieshed into by the said center-pinion.

In testimony whereof, I have signed this specification in the presenceof two subscribing witnesses.

VILSON E. PORTER.

it-nesses CLARA L. WEED GEORGE D. SEYMOUR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

